210 SURFACE GEOLOGY. 
there can be little doubt as to the south-west direction. Some of the 
examples given require scrutiny to decide which is the stoss and which 
the lee side, but all present the same appearances. Perhaps the most 
satisfactory cases are recently exposed by a clearing midway between 
the Glen house and the saw-mill, not seen by either Packard or Vose, 
The rounding on the north sides of the domes here is very conspicuous, 
while the south sides are rough and uneven, though not so much so as 
in the most perfect examples of stoss and lee action. At the lower end 
of the carriage-road the smoothing occupies a broad face of rock 200 feet 
long and 40 wide, with the north-east end the most worn. Two miles 
up this road the markings are on a vertical wall exhibiting a well defined 
example of the north-east force. A short distance south from the Glen 
house, where a tributary enters from the south-east, the greatest amount 
of wearing appears at the angle of the fork, and not upon its sides. 
All these cases show clearly that the principal force, or that making the 
striz and producing the embossment, proceeded west of south, and not 
northerly. There may have been a later current down the valley in the 
decline of the period, but this did not have strength enough to score 
the ledges. This later current explains the origin of the immense thick- 
ness of stratified deposits near the mouth of the Peabody river, called 
moraines by Packard and Vose. They are relics of the ancient flood 
plain, produced by the glacial river after the ice had been melted, cer- 
tainly as far up as the Glen house. These terraces are very conspicuous 
as far south as the mouth of Miss Barnes’s brook, and show differences 
in coloration like those between the upper and lower till. Mr. Upham 
agrees with me in this view (see p. 141), without any conference or sug- 
gestion whatever from me. 
The next examples of the movement west of south occur on the west 
side of the Presidential range, and seem to connect with the Connecticut 
Valley movement. It has not been observed in Carroll, probably be- 
cause of the scarcity of ledges. Observations are also wanting for 
Whitefield. Bethlehem abounds with them. The north-west slope of 
the Mt. Agassiz eminence has been powerfully struck and smoothed by 
it. This current passed over the summit of Mt. Agassiz, and followed 
some portions of its southern slope. From here southerly the current 
is merged with that of the Connecticut Valley movement. That seems 
